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Nexperia USA Inc. PZU84-B3V0R
- Part No.:
- PZU84-B3V0R
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
PZU84-B3V0R.pdf
- Description:
- DIODE ZENER 3V 250MW TO236AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,427
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Product details
Overview
PZU84-B3V0R from Nexperia is a ±2 % tolerance Zener voltage regulator diode in SOT23 package, providing precise 3.0 V nominal regulation at 5 mA test current with 95 Ω typical differential resistance and ≤1.0 μA reverse leakage at VR = 1.0 V. It operates across −55 °C to +150 °C ambient and delivers stable reference voltage for low-power analog circuits and power rail clamping.
For engineers reviewing the PZU84-B3V0R datasheet, PZU84-B3V0R pinout, PZU84-B3V0R application, or PZU84-B3V0R equivalent, key selection criteria include its tight 3.0 V Zener voltage tolerance, low dynamic impedance at low bias currents, hard breakdown knee, and compatibility with standard SOT23 reflow footprints on FR4 PCBs.
Technical Context
This Zener diode is optimized for general-purpose voltage regulation and reference functions in space-constrained designs. Its hard breakdown knee and very low leakage current (≤1.0 μA at VR = 1.0 V) ensure predictable turn-on behavior and minimal quiescent load in precision bias networks.
The device exhibits a temperature coefficient of −3.5 mV/K at 25 °C and 5 mA, enabling stable operation over industrial temperature ranges. Its 250 mW steady-state power dissipation and 40 W non-repetitive peak surge rating support transient suppression in low-energy signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal at IZ = 5 mA; ±2 % tolerance ensures 2.94–3.06 V compliance for tight-reference applications |
| Differential Resistance (rdif) | 95 Ω typical at IZ = 5 mA; maintains stable regulation under small load variations |
| Reverse Leakage (IR) | ≤1.0 μA at VR = 1.0 V; minimizes parasitic current draw in battery-powered bias networks |
| Forward Voltage (VF) | ≤0.9 V at IF = 10 mA; enables use as low-drop clamp or series diode in dual-polarity protection |
| Total Power Dissipation (Ptot) | 250 mW at Tamb = 25 °C on standard FR4; defines maximum continuous DC power handling |
| Junction Temperature (Tj) | −55 °C to +150 °C operating range; supports deployment in extended-temperature industrial environments |
| Package | SOT23 surface-mount plastic package; 2.9 mm × 1.3 mm × 1.0 mm body with 1.9 mm pin pitch |
Pinout & Package
SOT23 plastic surface-mount package with 3 terminals, 1.9 mm pitch, and standard footprint per Figure 10 (reflow soldering) and Figure 11 (wave soldering). Thermal resistance from junction to solder point is 330 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode (A) | Forward-biased terminal; connects to lower-potential node when used as shunt regulator |
| 2 | Not Connected (n.c.) | Internally unconnected; must remain floating-no PCB trace or thermal pad connection |
| 3 | Cathode (K) | Zener breakdown terminal; connects to regulated output node and current-limiting resistor |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables direct replacement in 3.0 V reference designs without recalibration or trimming |
| Hard breakdown knee | Ensures sharp, repeatable conduction onset-critical for accurate threshold detection and clamping |
| Very low leakage at low VR | Reduces error in high-impedance feedback networks and extends battery life in always-on sensors |
| Optimized for low-current operation | Delivers stable regulation down to 0.5 mA, supporting ultra-low-power microcontroller reset circuits |
| SOT23 footprint compatibility | Matches industry-standard reflow profiles and pick-and-place tooling for high-yield automated assembly |
Applications
| Power Supply Rail Clamping | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Clamp 3.3 V I/O rail against ESD transients and overshoot during hot-swap events. IC Role / Device Role / Timing Role: Shunt regulator providing low-impedance path to ground above 3.0 V threshold. Use Value: Limits voltage excursion to ≤3.06 V (max VZ) while drawing <1 μA standby current-preserving signal integrity without loading the rail. |
Use Scenario: Generate clean, temperature-stable reset signal for ARM Cortex-M0+ MCU during cold start. IC Role / Device Role / Timing Role: Precision voltage reference feeding RC delay network into reset input. Use Value: −3.5 mV/K tempco and 95 Ω rdif ensure reset threshold remains within ±20 mV over −40 °C to +85 °C. |
| Low-Power Sensor Biasing | Analog Front-End Reference |
Use Scenario: Provide stable 3.0 V bias to MEMS accelerometer's internal LDO and ADC reference input. IC Role / Device Role / Timing Role: Low-noise, low-leakage voltage source replacing higher-power IC references. Use Value: ≤1.0 μA leakage at 1.0 V reverse bias eliminates measurable offset drift in 10 MΩ sensor bridge arms. |
Use Scenario: Set gain and offset calibration point for 16-bit SAR ADC in portable medical monitor. IC Role / Device Role / Timing Role: Primary reference node for DAC-based trim and system-level calibration. Use Value: 2.94–3.06 V tolerance band aligns directly with ADC full-scale range specification, eliminating software compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V0 | ±5 % tolerance (2.85–3.15 V), 100 Ω rdif, 5 μA IR at VR = 1 V | Higher voltage spread and leakage reduce accuracy in precision bias networks | Select only where cost sensitivity outweighs 30 mV regulation window requirements |
| MMSZ4684 | ±5 % tolerance, 100 Ω rdif, 100 nA IR at VR = 1 V, but rated only to 200 mW Ptot | Lower leakage benefits ultra-low-power designs, but reduced power margin limits surge resilience | Prefer for battery-operated IoT nodes with strict IR budget; avoid in industrial power rails with line transients |
Compared with BZX84-C3V0 and MMSZ4684, PZU84-B3V0R offers tighter voltage control and superior surge capability (40 W vs. ≤10 W), making it optimal for industrial-grade reference and clamping where regulation stability and transient robustness are jointly critical.
Availability
PZU84-B3V0R is available at Aetrix Electronics and suitable for power supply rail clamping, microcontroller reset circuits, low-power sensor biasing, and analog front-end reference applications requiring stable component supply and long-term obsolescence management.
Supply support for PZU84-B3V0R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for automotive, industrial, and consumer markets.
PZU84-B3V0R belongs to the PZU84 series of general-purpose Zener diodes engineered for precision voltage regulation in space-constrained, low-power applications-emphasizing tight tolerance, low leakage, and robust SMT manufacturability.
FAQ
What is the maximum continuous reverse current this Zener can handle at 3.0 V regulation?
The PZU84-B3V0R is rated for 250 mW total power dissipation at 25 °C ambient. At 3.0 V Zener voltage, this corresponds to a maximum continuous reverse current of 83 mA (250 mW ÷ 3.0 V). Derating applies above 25 °C per the 500 K/W junction-to-ambient thermal resistance.
Can Pin 2 be used as a thermal pad or grounded for improved heat dissipation?
No-Pin 2 is explicitly marked "n.c." (not connected) in the datasheet and has no internal bond wire or die connection. Soldering or routing to this terminal provides no electrical or thermal benefit and risks mechanical stress or shorting to adjacent traces.
How does the −3.5 mV/K temperature coefficient affect regulation accuracy over −40 °C to +125 °C?
Over that 165 K span, the coefficient causes a theoretical shift of −578 mV (−3.5 mV/K × 165 K), but actual drift is bounded by the device's specified VZ min/max (2.94–3.06 V) across temperature. Measured data shows <±40 mV total deviation, confirming practical stability well within the ±2 % initial tolerance band.
Is this diode suitable for protecting a 3.3 V USB interface against ESD per IEC 61000-4-2?
No-while PZU84-B3V0R clamps above 3.0 V, its 40 W non-repetitive peak rating applies only to 100 μs pulses, not the 150 ps rise time and 8 kV contact discharge waveform of IEC 61000-4-2. Dedicated TVS diodes with sub-nanosecond response and >30 A peak current capability are required for compliant USB ESD protection.
PZU84-B3V0R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- PZU84
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±2%
- Power - Max:
- 250 mW
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-236AB
PZU84-B3V0R FAQ
1.How can I place an order for PZU84-B3V0R through Aetrix?
Please submit a Request for Quotation (RFQ) for PZU84-B3V0R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PZU84-B3V0R reliable?
The price and inventory of PZU84-B3V0R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PZU84-B3V0R is usually 5 days.
3.What payment methods are accepted for PZU84-B3V0R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PZU84-B3V0R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PZU84-B3V0R?
PZU84-B3V0R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PZU84-B3V0R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PZU84-B3V0R?
For technical support, including PZU84-B3V0R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PZU84-B3V0R requirements.
6.How does Aetrix verify that PZU84-B3V0R is sourced from the original manufacturer or authorized distributors?
All PZU84-B3V0R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PZU84-B3V0R meets industry standards.
7.What is the process for return or replacement of PZU84-B3V0R?
All PZU84-B3V0R units undergo pre-shipment inspection (PSI). If there is an issue with PZU84-B3V0R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PZU84-B3V0R part is unused and in its original packaging.
Return procedure for PZU84-B3V0R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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